Collecting bison==0.0.2
  1 location(s) to search for versions of bison:
  * https://pypi.python.org/simple/bison/
  Getting page https://pypi.python.org/simple/bison/
  Analyzing links from page https://pypi.python.org/simple/bison/
    Found link https://pypi.python.org/packages/3f/c2/c46b550c022c09e7d15b4d37a2df0c0447b57cf8fcddc65e9819e4bfe14e/bison-0.0.2-py2.py3-none-any.whl#md5=bb15f5a9932b990d6dc4e142bd82b7a6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.2
    Found link https://pypi.python.org/packages/4c/2b/be4601218f6c5e968da2580c0ece23fead89781ccaec938017e11699e19b/bison-0.0.1.tar.gz#md5=ce4bc1e3c06889101566dcf3620d27a0 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.1
    Found link https://pypi.python.org/packages/d0/59/1665577e705feaa2f0135e0de779cbb0f75b546ca8ddbfbc4960431dc0a0/bison-0.0.1-py2.py3-none-any.whl#md5=7c77e696bd15019fae2a6438f77919f6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.1
    Found link https://pypi.python.org/packages/f7/9a/4b37eb7296a40467cc07ce75883c2e492fc510f38d9ac8345003dee04216/bison-0.0.2.tar.gz#md5=522ed7ff0a90bac9522ae53f5f757d9d (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4), version: 0.0.2
  Using version 0.0.2 (newest of versions: 0.0.2)
  Downloading bison-0.0.2-py2.py3-none-any.whl
  Downloading from URL https://pypi.python.org/packages/3f/c2/c46b550c022c09e7d15b4d37a2df0c0447b57cf8fcddc65e9819e4bfe14e/bison-0.0.2-py2.py3-none-any.whl#md5=bb15f5a9932b990d6dc4e142bd82b7a6 (from https://pypi.python.org/simple/bison/) (requires-python:>=3.4)
  Saved /tmp/tmplu3r9f48/bison-0.0.2-py2.py3-none-any.whl
Skipping bison, due to already being wheel.
Cleaning up...
  Removing source in /tmp/pip-build-buv2d8ne/bison